The investigators uncovered the entire chain in relation to the terrorist attack in St. Petersburg metro, which occurred Exactly a year earlier. About this said the official authorized SC of Svetlana Petrenko. The staff of the Ministry together with the FSB installed by the customer, the organizer and perpetrators of the iniquity, she told. in her expressions, the terrorist act was committed by members of the radical Islamist brotherhood, which was not even familiar with each other. They communicated only in the messenger, he stated. As stated by the Commissioner SK, bandits found from the analysis of so-called e-traces which remain, when such means of communication. Petrenko added that in the process of investigation has arrested eleven people. The investigation is almost complete. Exactly a year earlier on the stretch between the stations "Sennaya Ploschad" and "Tekhnologichesky Institut-2" St. Petersburg underground explosion. Lost the lives of 16 people and among them a suicide bomber, Akbarian Jalilov. Later at the station "Ploschad Vosstaniya" found another improvised explosive device was defused. Last summer, the FSB said that terrorists preparing explosion in the underground, actively used the Telegram to coordinate their actions. The Ministry stressed that this messenger gives you the ability to create secret chats with high level of encryption of the transmitted information.